Author Topic: AHU P/S Delete Pulley Assy  (Read 11023 times)

February 08, 2015, 08:08:24 pm

GEE-BEE

  • Veteran

  • Offline
  • ***

  • 1604
  • Personal Text
    1981 with South African front end ,42 k original


1.9 AAZ, CHD 5spd with Peloquin
KO4/KO3 Hybrid turbo
Giles Pump OHC
Complete Techtonics 2'5 S/S DP and Exhaust
Coilovers, MKII Pedal Swap,G60 BRAKES
MK1 JETTA DASH
675MM 16V radiator (MKII) PASSAT DUAL FAN
42K original miles , South African Front End
15x6 Le Casletts 195-45-15

Reply #1February 12, 2015, 05:06:40 pm

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #1 on: February 12, 2015, 05:06:40 pm »
Why would you want an unnecessary idler?  It's easier, more reliable and less expensive to eliminate the pump and do the necessary pulley swap to run without it.

Reply #2February 12, 2015, 05:50:46 pm

vanbcguy

  • Administrator
  • Veteran

  • Offline
  • *****

  • 2831
  • Personal Text
    Vancouver, BC
Re: AHU P/S Delete Pulley Assy
« Reply #2 on: February 12, 2015, 05:50:46 pm »
The kit is for the specific scenario of wanting AC but no PS. 

If you don't want either AC or PS then the ABA pulley works fine, if you want no AC but you DO want PS then you run the PS pump on its own belt with the ABA pulley.  If you want AC but no PS you're SOL since you can't use the ABA pulley and still drive the AC compressor with the serpentine belt, and there's no way to tension the water pump v-belt without something in the PS pump location.
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #3March 22, 2015, 01:23:00 am

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #3 on: March 22, 2015, 01:23:00 am »
I have an AHU with A/C and no PS in my '83 vanagon and I like my setup a lot better than having an additional idler that can fail and stop the running of my critical water pump.  The 1.6TD Quantum and Audi 4000 came with a water pump pulley that has the correct offset (when flipped around) and also is a split pulley design with shims for belt tension adjustment.  It is still available new from VW as are the shims.  I've posted the part #s before for all the parts but I'm too lazy to look them up again.  The end result is the serp belt runs the alt and A/C compressor and the water pump is run by its own dedicated v-belt.
« Last Edit: March 22, 2015, 01:25:51 am by libbydiesel »

Reply #4March 22, 2015, 01:29:52 am

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #4 on: March 22, 2015, 01:29:52 am »
Found my post with part #s:

What would make adding a custom idler and correctly sized ribbed belt easier or better than the stock bolt-on quantum water pump pulley?  The Q pulley is part number 068121029A, the shims are 068121185B (4 or 5 will suffice) and the belt is 10x650.  The pulley is still available new from VW for $60ish and the shims are less than $2 each.   

Reply #5May 29, 2015, 03:47:15 pm

G60ING

  • Junior

  • Offline
  • **

  • 170
  • Personal Text
    Corrado TDI
    • My VW Projects
Re: AHU P/S Delete Pulley Assy
« Reply #5 on: May 29, 2015, 03:47:15 pm »
I'm not 100% certain because I've never tried it but couldn't a person use an AEB 20V passat's waterpump pulley and belt? Not tensioner required, but I will say that the part linked about looks like a nice chunk of work.

Reply #6May 29, 2015, 06:20:10 pm

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #6 on: May 29, 2015, 06:20:10 pm »
I haven't dealt with the AEB, but in looking it up it appears to be a v-belt split pulley design much like the quantum one that I posted.  The offset does not look correct, though, for the v-belt pulley on the AHU.  I know the quantum one is correct as I've had it working on my '83 AHU equipped vanagon for several years (4?) without issue.  If the quantum pulley becomes NLA, it looks like the AEB one coule be shimmed out easily enough and is a very nice fallback.  Thanks for the info. 

Reply #7June 03, 2015, 11:42:59 pm

G60ING

  • Junior

  • Offline
  • **

  • 170
  • Personal Text
    Corrado TDI
    • My VW Projects
Re: AHU P/S Delete Pulley Assy
« Reply #7 on: June 03, 2015, 11:42:59 pm »
Here are some pics I have from a motor build a few years back hopefully they will help somebody in a similar bind:


Reply #8July 02, 2015, 01:12:58 pm

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #8 on: July 02, 2015, 01:12:58 pm »
I would definitely prefer the Quantum/Audi pulley over that setup.  In the pictured AEB setup, the water pump (the only critical component) is relying on the proper function of all the other accessories, serp tensioner, idler and the water pump belt itself.  With the Quantum setup, the water pump is driven by the crank on its own dedicated belt which means that all of the non-critical accessory components and serp belt/tensioner can fail and you can continue to motor on indefinitely without risk to the engine. 
« Last Edit: July 12, 2015, 09:47:17 pm by libbydiesel »

Reply #9October 10, 2019, 08:45:23 pm

dave.arthur

  • Newbie

  • Offline
  • *

  • 10
AHU P/S Delete and A/C Delete
« Reply #9 on: October 10, 2019, 08:45:23 pm »

If you don't want either AC or PS then the ABA pulley works fine...

So I have an AHU that was fitted with a P/S and A/C. I only need the water pump and alternator. What is the ABA fix? Is there other accessory bracketing that will work ... This is going into a Vanagon /T3.

Thanks

Reply #10October 10, 2019, 10:02:36 pm

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #10 on: October 10, 2019, 10:02:36 pm »
Get the serp water pump pulley and the correct serp belt to run alt and water pump.  Bob's your uncle. 

Reply #11October 11, 2019, 07:36:18 am

dave.arthur

  • Newbie

  • Offline
  • *

  • 10
Re: AHU P/S Delete Pulley Assy
« Reply #11 on: October 11, 2019, 07:36:18 am »
What engine would the 'correct pulley' be from? I found this pulley from vdamper http://www.vdamper.com/Serpentine-Water-Pump-Pulley--19-TDI-%E2%80%93-104mm_p_62.html

I note that is apparently smaller to spin the water pump a little faster on a diesel host.


Reply #12October 11, 2019, 11:46:54 am

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #12 on: October 11, 2019, 11:46:54 am »
That looks like a really good option.  The stock serpentine water pump pulley was actually flat and ran the points of the belt on the flat steel surface which I always thought was really odd although it worked fine.

This is the stock pulley:  https://www.ecstuning.com/b-genuine-volkswagen-audi-parts/water-pump-pulley/021121031d/?gclid=EAIaIQobChMIq6u5scWU5QIVD_DACh1o5gsYEAQYASABEgLDw_D_BwE

Reply #13October 11, 2019, 06:56:54 pm

dave.arthur

  • Newbie

  • Offline
  • *

  • 10
Re: AHU P/S Delete Pulley Assy
« Reply #13 on: October 11, 2019, 06:56:54 pm »
If that pulley has a smooth surface running against the ribs of the belt, it is certainly not as good as running with a ribbed pulley. The pulley from vdamper looks like a good investment.


Reply #14October 11, 2019, 07:21:09 pm

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: AHU P/S Delete Pulley Assy
« Reply #14 on: October 11, 2019, 07:21:09 pm »
I agree.  Thanks for the link on it.  I wasn't aware that someone was making/selling a ribbed version.  I'll definitely go that route if I run one without A/C 

 

Fixmyvw.com